I have been into Gatwick loads of times picking up friends flying into the country from Canada and for meetings at the CAA. Yes you can still get the free bus to the belgrano from the terminal.
Handling is first class, getting a slot is not a problem, they like a couple of days notice ideally. Fees are based on weight and actually quite good.
I am booked in for the 11th to collect a friend inbound from Halifax NS and to return him again a week later.
I have even been in once VFR and the service from zone to ground is always first class. Don't go in anything slow if you want to show respect for the CAT guys on a schedule. I have been asked a couple of times to keep 130kts down the ILS.